package com.hbb20;

import java.util.ArrayList;
import java.util.List;

public class KeyboardManager {
    private static KeyboardManager keyboard;

    private static List<KeyboardListener> list = new ArrayList<>();

    /**
     * get
     *
     * @return KeyboardManager
     */
    public static KeyboardManager get() {
        if (keyboard == null) {
            keyboard = new KeyboardManager();
        }
        return keyboard;
    }

    /**
     * addKeyKeyboardListener
     *
     * @param keyboardListener keyboardListener
     */
    public void addKeyKeyboardListener(KeyboardListener keyboardListener) {
        if (list == null) {
            list = new ArrayList<>();
        }
        list.add(keyboardListener);
    }

    /**
     * removeKeyboardListener
     *
     * @param keyboardListener keyboardListener
     */
    public void removeKeyboardListener(KeyboardListener keyboardListener) {
        if (list == null) {
            return;
        }
        list.remove(keyboardListener);
    }

    /**
     * dispatchListener
     *
     * @param show   show
     * @param height height
     */
    public void dispatchListener(boolean show, int height) {
        if (list == null || list.isEmpty()) {
            return;
        }
        list.forEach(keyboardListener -> keyboardListener.onKeyboardListener(show, height));
    }

    /**
     *KeyboardListener
     */
    public interface KeyboardListener {
        /**
         * onKeyboardListener
         *
         * @param show   show
         * @param height height
         */
        void onKeyboardListener(boolean show, int height);
    }

}
